效果预览
按下右侧的“点击预览”按钮可以在当前页面预览,点击链接可以全屏预览。
https://codepen.io/comehope/pen/pZXzaY
可交互视频
此视频是可以交互的,你可以随时暂停视频,编辑视频中的代码。
请用 chrome, safari, edge 打开观看。
https://scrimba.com/p/pEgDAM/c3qbkh8
源代码下载
每日前端实战系列的全部源代码请从 github 下载:
https://github.com/comehope/front-end-daily-challenges
代码解读
定义 dom,容器中包含的子元素分别表示耳朵、眼睛和嘴,嘴里还有牙齿:
<div class="monster">
<span class="ear left"></span>
<span class="ear right"></span>
<span class="eye"></span>
<span class="mouth">
<span class="tooth"></span>
</span>
</div>
居中显示:
body {
margin: 0;
height: 100vh;
display: flex;
align-items: center;
justify-content: center;
background: linear-gradient(lightcyan, lightblue);
}
画出怪兽的轮廓:
.monster {
width: 10em;
height: 13em;
font-size: 16px;
color: blueviolet;
background-color: currentColor;
border-radius: 5em 5em 0 0 / 6em 6em 0 0;
}
画出眼睛的轮廓:
.monster {
position: relative;
}
.eye {
position: absolute;
width: 6.5em;
height: 6.5em;
background: white;
border-radius: 77% 77% 77% 77% / 92% 92% 60% 60%;
top: 2em;
left: calc((10em - 6.5em) / 2);
box-shadow: 0.2em 0.9em 0 rgba(0, 0, 0, 0.1);
}
用径向渐变画出眼珠和瞳孔:
.eye {
background:
radial-gradient(
circle at 50% 25%,
white 0.4em,
transparent 0.4em
),
radial-gradient(
circle at 50% 40%,
black 1.7em,
transparent 1.7em
),
white;
}
画出嘴的轮廓:
.mouth {
position: absolute;
width: 3em;
height: 2.1em;
background-color: black;
border-radius: 70% 70% 3.5em 3.5em;
bottom: 0.9em;
left: calc((10em - 3em) / 2);
}
用伪元素画出舌头:
.mouth {
overflow: hidden;
}
.mouth::before {
content: '';
position: absolute;
width: inherit;
height: 0.6em;
background-color: tomato;
border-radius: 50% 50% 0 0;
bottom: 0;
}
画出三颗牙齿的中间那颗:
.tooth {
position: absolute;
border-top: 0.8em solid white;
border-left: 0.4em solid transparent;
border-right: 0.4em solid transparent;
left: 1.1em;
}
用伪元素画出三颗牙齿的左右两颗:
.tooth::before,
.tooth::after {
position: absolute;
border-top: 0.8em solid white;
border-left: 0.4em solid transparent;
border-right: 0.4em solid transparent;
left: 1.1em;
}
.tooth::before {
content: '';
left: -1.1em;
top: -0.8em;
}
.tooth::after {
content: '';
left: 0.3em;
top: -0.8em;
}
画出耳朵的形状:
.ear {
position: absolute;
width: 2.4em;
height: 4.5em;
top: -3em;
}
.ear::before {
content: '';
position: absolute;
width: 0.9em;
height: inherit;
background-color: currentColor;
left: calc((2.4em - 0.9em) / 2);
}
.ear::after {
content: '';
position: absolute;
width: 2.4em;
height: 2.4em;
top: -0.5em;
background-color: currentColor;
border-radius: 50%;
box-shadow: inset -0.3em -0.2em 0 rgba(0, 0, 0, 0.1);
}
分别定位左耳和右耳:
.ear {
transform-origin: bottom center;
transform: rotate(calc(10deg * var(--direction)));
}
.ear.left {
left: 2em;
--direction: -1;
}
.ear.right {
right: 2em;
--direction: 1;
}
接下来增加动画效果:
增加身体轻微弹动的效果:
.monster {
transform-origin: bottom center;
animation: body-bounce 1s infinite;
}
@keyframes body-bounce {
50% {
transform: scaleX(1.03) scaleY(0.97);
}
}
增加耳朵轻微颤动的效果:
.ear {
animation: ears-shake 5s infinite;
}
@keyframes ears-shake {
50% {
transform: rotate(calc(20deg * var(--direction)));
}
}
增加眨眼效果:
.eye {
animation: eye-blink 5s infinite;
}
@keyframes eye-blink {
0%, 6% {
transform: scaleX(1) scaleY(1);
}
3% {
transform: scaleX(1.03) scaleY(0.1);
}
}
大功告成!
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